superhard

adjective

su·per·hard ˌsü-pər-ˈhärd

: extremely hard

One way to achieve such a high pressure … is to squeeze a sample between two superhard surfaces.—

William J. Nellis

Examples of superhard in a Sentence

Recent Examples on the Web Being a parent is superhard. —

Kate Siber, Outside Online, 13 June 2019

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